l thinkall lexus is are premium

no ,not all of them are 93 octane,i work on for a customer of mine,and it runs very well on 87 octane,and even in the book it says it will run on 87 he uses 89 octane most of the time in it though but when he does have to use 87 in it there is not a noticeable change in the way it runs as long as you use a good brand gas in it,cheap gas runs like cheap gas,it will sometimes cause one to spark knock,and ping a little,good luck with it.

minimum 91 anything else and your valves will make noise and will require adjustment sooner than it is required. Car is tuned to run on premium with 91 min..... any one else say otherwise just read your owners manual.

it will run on reg just fine, but the pistons will need to be replaced often

l use 93 or higher in my 2001 gs430. lexus uses premium only

i dont kno v6 use what gas